17 MBytes/s in each direction.
From Atlas graph, your node is currently growing up, so wait few weeks more to have the real bandwidth consumption, but don’t expect huge change.
17M*B*ps is 140M*b*ps and you already have a good relay :) This is around the speed expected for standard CPU (150 to 300Mbps per Tor instance, best CPU available can "only" drain around 500Mbps).
And your CPU have all chance to be the bottleneck at this speed. Tor is not multi-core at the moment and so you can’t be able to fully use your CPU capacity. For example, if you have a 4-core CPU, don’t expect to have more than 0.25-0.3 load with only Tor (1 core fully used).
You have to start another Tor instance to use a little more your CPU (1 other core) and so to drain additionnal 150-300Mbps.
Regards,